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首页> 外文期刊>Journal of Applied Physics >Polaron relaxation associated with the localized oxygen vacancies in Ba_(0.85)Sr_(0.15)TiO_3 ceramics at high temperatures
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Polaron relaxation associated with the localized oxygen vacancies in Ba_(0.85)Sr_(0.15)TiO_3 ceramics at high temperatures

机译：高温下Ba_（0.85）Sr_（0.15）TiO_3陶瓷中局部氧空位的极化子弛豫

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摘要

The temperature and frequency dependences of dielectric properties of barium strontium titanate [Ba_(0.85)Sr_(0.15)TiO_3 (BST15)] ceramics have been investigated. The dielectric relaxation behavior above 180 ℃ was observed in BST15 ceramics with broad dielectric peaks. The contribution of dc conduction and universal dielectric response to the relaxation has been studied. In contrast to typical ion conductor such as La_2Mo_2O_9, the extent of dielectric dispersion shows the similar temperature dependence characteristic. Polaron theory indicates that the relaxation in BST15 ceramics at high temperatures is associated with the hopping localized oxygen vacancies.
机译：研究了钛酸钡锶[Ba_（0.85）Sr_（0.15）TiO_3（BST15）]介电材料的温度和频率依赖性。在具有宽介电峰的BST15陶瓷中观察到180℃以上的介电弛豫行为。研究了直流传导和通用介电响应对弛豫的影响。与典型的离子导体（例如La_2Mo_2O_9）相比，介电扩散程度显示出相似的温度依赖性特性。极化子理论表明，高温下BST15陶瓷的弛豫与跳跃的局部氧空位有关。

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  • 来源
    《Journal of Applied Physics》 |2009年第5期|054102.1-054102.5|共5页
  • 作者

    Zhuo Li; Huiqing Fan;

  • 作者单位

    State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China;

    State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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